An Aloha man accused of sexually assaulting two children in his family, including a severely disabled teenage boy on a respirator, pleaded guilty last week to all charges against him, court records show.

The couple was charged in February in Portland's U.S. District Court with arranging the children for sexually explicit photos, which reportedly were emailed to others. Both Ford and Marceau still have pending federal cases, records show.

WCSOLisa A. Ford

The case against the couple began in January 2010, when someone in Portland's U.S. Bureau of Indian Affairs Office discovered that an employee had been using a government-issued laptop computer to trade child pornography, according to a government affidavit. The U.S. Department of Interior's Office of the Inspector General opened an investigation, finding that the Indian Affairs employee had traded child pornography with Marceau's email account, according to the criminal complaint.

Investigators reportedly captured a sexually explicit image sent from Marceau to the government employee, showing a little girl next to a man. Authorities searched Marceau's Aloha home and seized computers and camera gear.

Marceau shared the home with Ford along with his son and daughter, and Ford's children, a girl and the teenage boy. Ford's son "has been diagnosed with cerebral palsy, epilepsy and mental retardation," according to an affidavit signed in February 2010 by U.S. Immigration and Customs Enforcement Senior Special Agent Josh Findley. The affidavit also said the teenage boy "cannot move on his own."

The couple acknowledged taking photographs of themselves in various sex acts with Ford's children, according to the affidavit, and authorities found images from those acts on two computers and a camera.

Ford reportedly told investigators that she did not know of any sexual abuse involving Marceau's children, the affidavit said. Marceau admitted to agents that he traded images of child pornography with at least 15 people using Yahoo! picture sharing, the affidavit said.

Ford's children were placed in protective custody. She faces 47 counts in Washington County and has trial scheduled in June, court records show.